<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Service
 * @subpackage Technorati
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Utils.php 18951 2009-11-12 16:26:19Z alexander $
 */


/**
 * Collection of utilities for various Zend_Service_Technorati classes.
 *
 * @category   Zend
 * @package    Zend_Service
 * @subpackage Technorati
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Service_Technorati_Utils
{
	/**
	 * Parses, validates and returns a valid Zend_Uri object
	 * from given $input.
	 *
	 * @param   string|Zend_Uri_Http $input
	 * @return  null|Zend_Uri_Http
	 * @throws  Zend_Service_Technorati_Exception
	 * @static
	 */
	public static function normalizeUriHttp($input)
	{
		// allow null as value
		if ($input === null) {
			return null;
		}

		/**
		 * @see Zend_Uri
		 */
		require_once 'Zend/Uri.php';
		if ($input instanceof Zend_Uri_Http) {
			$uri = $input;
		} else {
			try {
				$uri = Zend_Uri::factory((string) $input);
			}
			// wrap exception under Zend_Service_Technorati_Exception object
			catch (Exception $e) {
				/**
				 * @see Zend_Service_Technorati_Exception
				 */
				require_once 'Zend/Service/Technorati/Exception.php';
				throw new Zend_Service_Technorati_Exception($e->getMessage());
			}
		}

		// allow inly Zend_Uri_Http objects or child classes
		if (!($uri instanceof Zend_Uri_Http)) {
			/**
			 * @see Zend_Service_Technorati_Exception
			 */
			require_once 'Zend/Service/Technorati/Exception.php';
			throw new Zend_Service_Technorati_Exception(
                "Invalid URL $uri, only HTTP(S) protocols can be used");
		}

		return $uri;
	}
	/**
	 * Parses, validates and returns a valid Zend_Date object
	 * from given $input.
	 *
	 * $input can be either a string, an integer or a Zend_Date object.
	 * If $input is string or int, it will be provided to Zend_Date as it is.
	 * If $input is a Zend_Date object, the object instance will be returned.
	 *
	 * @param   mixed|Zend_Date $input
	 * @return  null|Zend_Date
	 * @throws  Zend_Service_Technorati_Exception
	 * @static
	 */
	public static function normalizeDate($input)
	{
		/**
		 * @see Zend_Date
		 */
		require_once 'Zend/Date.php';
		/**
		 * @see Zend_Locale
		 */
		require_once 'Zend/Locale.php';

		// allow null as value and return valid Zend_Date objects
		if (($input === null) || ($input instanceof Zend_Date)) {
			return $input;
		}

		// due to a BC break as of ZF 1.5 it's not safe to use Zend_Date::isDate() here
		// see ZF-2524, ZF-2334
		if (@strtotime($input) !== FALSE) {
			return new Zend_Date($input);
		} else {
			/**
			 * @see Zend_Service_Technorati_Exception
			 */
			require_once 'Zend/Service/Technorati/Exception.php';
			throw new Zend_Service_Technorati_Exception("'$input' is not a valid Date/Time");
		}
	}

	/**
	 * @todo public static function xpathQueryAndSet() {}
	 */

	/**
	 * @todo public static function xpathQueryAndSetIf() {}
	 */

	/**
	 * @todo public static function xpathQueryAndSetUnless() {}
	 */
}
